Create a corresponding Firefly action generator

[meryllblanchet]

Looking at the possibility to use the SDK within a Project Firefly app (e.g. for server-side rendering use-cases), we welcome PRs to our application generators repository.

One idea would be to add a generator for an action that renders the delivered content server-side.

[meryllblanchet]

A Runtime action generator would use https://github.com/adobe/aem-headless-client-nodejs/ and I'll create a mirror issue there.

However let's keep this one open for a possible future B2C SPA client-side code generator, that would use this client JS SDK.

[gknobloch]

Linking to adobe/aem-headless-client-nodejs#2